CN209126175U - A kind of desktop grade 3D printer based on 3DP technique - Google Patents
A kind of desktop grade 3D printer based on 3DP technique Download PDFInfo
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- CN209126175U CN209126175U CN201821835210.2U CN201821835210U CN209126175U CN 209126175 U CN209126175 U CN 209126175U CN 201821835210 U CN201821835210 U CN 201821835210U CN 209126175 U CN209126175 U CN 209126175U
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Abstract
Desktop grade 3D printer disclosed by the utility model based on 3DP technique, including main control mechanism, truss, y-axis feed mechanism, x-axis feed mechanism, printing mechanism, powder cylinder and z-axis elevating mechanism；Y-axis feed mechanism is set to truss, x-axis feed mechanism is set to y-axis feed mechanism and moves along the y-axis direction, printing mechanism is set to x-axis feed mechanism and moves along the x-axis direction, powder cylinder is used to supply printing powder to printing mechanism and provides molding space, and z-axis elevating mechanism is for driving powder cylinder to move along the z-axis direction.The utility model adjusts the two-dimensional surface mechanism position of printing mechanism by x-axis feed mechanism and y-axis feed mechanism, and the z-axis feed mechanism on vertical direction adjusts powder bottom plate and goes up and down along the z-axis direction, in conjunction with main control mechanism, so that the desktop grade 3D printer of the utility model is able to use multiple material, the three-dimensional printing of preferable precision is realized.
Description
Technical field
The utility model belongs to 3D printing equipment technical field, and in particular to a kind of desktop grade 3D based on 3DP technique is beaten
Print machine.
Background technique
Rapid shaping technique can effectively shorten the R&D cycle, wherein using the 3D printer of 3DP technique without support
Structure, shaping speed are fast, equipment investment is small, operation is low with maintenance cost, printable colored prototype, and applicability is good, is considered
With good development potentiality and application prospect, there is very big writing space.
Since 21 century, 3DP is proposed in foreign countries and has been obtained swift and violent development, and is only occurred on domestic market
The technical grade 3DP technique 3D printer of the less type of two or three Corporation R & D, for the 3D printer of desktop grade 3DP technique
Or blank.In the market it is more be desktop grade FDM technique 3D printer, the material used is usually ABS or PLA material,
Relative to above-mentioned material, the material that desktop grade 3DP technique 3D printer uses can be more, for example, gypsum, ceramics, plastics, sand,
Metal powder etc., and printing precision and more efficient.In short, the design of the 3D printer of desktop grade 3DP technique, can fill up city
Field blank, at low cost, precision is high, easily uses, and can be used for industrial design, wound visitor, education, medical treatment, animation, archaeology, lamp decoration etc.
Field has broad application prospects.
Utility model content
The purpose of this utility model is to provide a kind of desktop grade 3D printer based on 3DP technique, is able to use a variety of
Material, the higher small shape part of machining accuracy, can be adapted for multiple fields.
The technical scheme adopted by the utility model is a kind of desktop grade 3D printer based on 3DP technique, including master control
Mechanism, truss, y-axis feed mechanism, x-axis feed mechanism, printing mechanism, powder cylinder, bonding agent are even for box and z-axis elevating mechanism；
The main control mechanism respectively with y-axis feed mechanism, x-axis feed mechanism, printing mechanism and z-axis elevating mechanism signal
It is connected；
The y-axis feed mechanism is set to the truss top,
The x-axis feed mechanism is set to the y-axis feed mechanism and moves along the y-axis direction,
The printing mechanism is set to the x-axis feed mechanism and moves along the x-axis direction, the x-axis direction and y-axis direction
In same level, the printing mechanism is even connected for box by hose with the bonding agent,
The powder cylinder is located at below the printing mechanism, and the powder cylinder is used to supply printing powder simultaneously to the printing mechanism
Molding space is provided,
The z-axis elevating mechanism is set to the truss lower part, and the powder cylinder is set to the z-axis elevating mechanism, the z
Axis elevating mechanism is for driving the powder cylinder to move along the z-axis direction, the z-axis direction and horizontal plane.
The utility model is also characterized by
The y-axis feed mechanism include horizontal alignment and be rotatably dispose on the truss two y-axis transmission feed rod, two
A y-axis transmission feed rod is sheathed with y-axis toothed belt, the y-axis tooth form of ipsilateral two close to the both ends of the truss
By tooth form band connection between belt wheel, one of y-axis transmission feed rod also passes through toothed belt and is connected with y to feeding motor；
The y-axis feed mechanism further includes two y-axis guide rail polished rods that horizontal alignment is set on the truss, the y
Axis rail polished rod and y-axis transmission feed rod are orthogonal, are respectively sheathed with y-axis sliding block on two y-axis guide rail polished rods, described
Y is disposed therein on the y-axis sliding block to feeding motor, and two y-axis sliding blocks are individually fixed in ipsilateral y-axis tooth form
It takes；
The x-axis feed mechanism is fixed on two y-axis sliding blocks.
The x-axis feed mechanism includes the x-axis toothed belt being rotatably dispose on two y-axis sliding blocks respectively, and two
It is connected between the x-axis toothed belt by x-axis toothed belt, one of them described x-axis toothed belt is fixed with x to feeding electricity
Machine, the x is on the y-axis sliding block fed where motor is set to the x-axis toothed belt；
The x-axis feed mechanism further includes two x-axis guide rail polished rods being fixedly connected between y-axis sliding block, two x
It is sheathed with x-axis sliding block on axis rail polished rod, is individually fixed on ipsilateral x-axis rack gear on two x-axis sliding blocks, the printing
Mechanism is fixed on two x-axis sliding blocks.
The printing mechanism includes printing head frame and the printing head being set on the printing head frame and powdering
Roller, the printing head frame are fixed on two x-axis sliding blocks, and the printing head and the bonding agent even pass through hose for box
It is connected, the powder-laying roller both ends are rotationally connected on two y-axis sliding blocks, and the powder-laying roller is driven certainly by powdering roller motor
Turn.
The powder cylinder includes powder supply cylinder and moulding cylinder.
The powder cylinder includes the coaming plate of upper and lower opening, is provided with partition in the coaming plate, and the partition is by space in coaming plate
It is divided into powder supply cylinder and moulding cylinder.
The z-axis elevating mechanism include two z-axis lifting units, two z-axis lifting units respectively drive the powder supply cylinder and at
The lifting of type cylinder, the z-axis lifting unit include the upper end fixed plate and lower end fixed plate that polished rod connection is oriented to by z-axis, the z-axis
It is arranged with z-axis slide plate on guiding polished rod, is connected between the z-axis slide plate and lower end fixed plate by lead screw assembly, the lead screw
One end fixing sleeve that component is fixed on the lower end fixed plate is equipped with z-axis toothed belt, the z-axis lifting unit further include z into
To motor, the z is also fixed with z-axis toothed belt to feeding motor, and two z-axis toothed belts pass through z-axis toothed belt phase
Even；The upper end of the z-axis slide plate is connected with support rod, and the support rod passes through the upper end fixed plate, the support rod it is upper
End is connected with powder supporting plate, and the powder supporting plate is connected with powder bottom plate by leveling component.
The leveling component is four-corner leveling nut.
The powder cylinder further includes powder collection device.
The beneficial effects of the utility model are: the desktop grade 3D printer based on 3DP technique of the utility model, passes through water
Orthogonal x-axis feed mechanism and y-axis feed mechanism adjust the two-dimensional surface mechanism position of printing mechanism square upwards, with
And the z-axis feed mechanism on vertical direction adjusts powder bottom plate and goes up and down along the z-axis direction, in conjunction with main control mechanism, so that this is practical new
The desktop grade 3D printer of type is able to use multiple material, realizes the three-dimensional printing of preferable precision small parts or craftwork, fits
For multiple fields.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of desktop grade 3D printer based on 3DP of the utility model；
Fig. 2 is the structural schematic diagram of x-axis feed mechanism, y-axis feed mechanism and printing mechanism in Fig. 1；
Fig. 3 is the structural schematic diagram of powder cylinder assembly in Fig. 1；
Fig. 4 is powder moulding cylinder z-axis elevating mechanism and powder supply cylinder z-axis elevating mechanism structural schematic diagram in Fig. 1.
In figure, 1. truss, 2.y axis rail polished rod, 3. powdering roller motors, 4. binders are even for box device, 5. hoses, and 6. dozens
Print jet nozzle, 7.y axis be driven feed rod support frame, 8.y axis be driven feed rod, 9.y to feeding motor, 10.x to feeding motor, 11.y
Axis sliding block, 12. powder cylinders, 13. the oneth z to feeding motor, 14. lower end fixed plates, 15. powder-laying rollers, 16.x axis rail polished rod, 17.y
Axis rail polished rod support frame, 18. powder-laying roller synchronous pulleys, 19. powdering roller motor synchronous pulleys, 20. printing heads, 21.x axis tooth
Shape belt wheel, 22. powder collection devices, 23. moulding cylinders, 24. powder supply cylinders, 25. partitions, 26. fixed plates, 27. coaming plates, 28. supports
Bar, 29. powder bottom plates, 30. powder supporting plates, 31. fixed end bases, 32. lead screws, 33. screw rod bushings, 34. the oneth z to feeding motor
Cover, 35.z axis slide plate, 36. the 2nd z support end seats, 39.z axis rail to feeding motor cover, 38. to feeding motor, 37. the 2nd z
Polished rod, 40. upper end fixed plates, 41. ball studs, 42. four-corner leveling nuts.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1 to Fig. 4, the desktop grade 3D printer provided by the utility model based on 3DP, including main control mechanism (figure
Do not show), truss 1, y-axis feed mechanism, x-axis feed mechanism, printing mechanism, powder cylinder 12, bonding agent even go up and down for box 4 and z-axis
Mechanism；
Main control mechanism respectively with y-axis feed mechanism, x-axis feed mechanism, printing mechanism and z-axis elevating mechanism signal phase
Even；
Y-axis feed mechanism is set to 1 top of truss,
X-axis feed mechanism is set to y-axis feed mechanism and moves along the y-axis direction,
Printing mechanism is set to x-axis feed mechanism and moves along the x-axis direction, and x-axis direction and y-axis direction are in same level
Face, printing mechanism are even connected for box 4 by hose 5 with bonding agent,
Powder cylinder 12 is located at printing mechanism lower section, and powder cylinder 12 is used to supply printing powder to printing mechanism and provides molding sky
Between,
Z-axis elevating mechanism is set to 1 lower part of truss, and powder cylinder 12 is set to z-axis elevating mechanism, and z-axis elevating mechanism is for driving
Dynamic powder cylinder 12 moves along the z-axis direction, z-axis direction and horizontal plane.
Specifically, y-axis feed mechanism include horizontal alignment and be rotatably dispose on truss 1 two y-axis transmission feed rod 8,
Two y-axis transmission feed rods 8 are sheathed with y-axis toothed belt close to the both ends of truss 1, between two ipsilateral y-axis toothed belts
By tooth form band connection, one of y-axis transmission feed rod 8 is also connected with y to feeding motor 9 by toothed belt；In the present embodiment,
Y-axis is set on truss 1 and is driven feed rod support frame 7, y-axis transmission feed rod 8 is set to the opposite y-axis transmission feed rod support frame in two sides
7.It is correspondingly arranged toothed belt on motor 9 and the y-axis transmission feed rod 8 for passing through tooth form band connection with motor 9, which is sheathed on
Between the two toothed belts.
Y-axis feed mechanism further includes two y-axis guide rail polished rods 2 that horizontal alignment is set on truss 1, y-axis guide rail polished rod 2
It is orthogonal with y-axis transmission feed rod 8, y-axis sliding block 11 is respectively sheathed on two y-axis guide rail polished rods 2, y is set to feeding motor 9
On one of y-axis sliding block 11, two y-axis sliding blocks 11 are individually fixed in ipsilateral y-axis toothed belt；Specifically, y-axis sliding block 11
It is connected rack gear by screw, which engages with y-axis rack gear band.
X-axis feed mechanism is fixed on two y-axis sliding blocks 11.Specifically, x-axis feed mechanism includes being rotatably dispose in two respectively
X-axis toothed belt 21 on a y-axis sliding block 11 is connected between two x-axis toothed belts 21, wherein one by x-axis toothed belt
A x-axis toothed belt 21 is fixed with x to feeding motor 10, and x is set to the y at 21 place of x-axis toothed belt to feeding motor 10
On axis sliding block 11；
X-axis feed mechanism further includes two x-axis guide rail polished rods 16 being fixedly connected between y-axis sliding block 11, and two x-axis are led
It is sheathed with x-axis sliding block on rail polished rod 16, is individually fixed on two x-axis sliding blocks on ipsilateral x-axis rack gear.
Printing mechanism is fixed on two x-axis sliding blocks.Specifically, printing mechanism include printing head frame 6 and be set to beat
The printing head 20 and powder-laying roller 15 on jet nozzle 6 are printed, printing head frame 6 is fixed on two x-axis sliding blocks, and 15 both ends of powder-laying roller turn
Dynamic to be connected on two y-axis sliding blocks 11, powder-laying roller 15 drives rotation by powdering roller motor 3.Specifically, fitting on powder-laying roller 15
Powder-laying roller synchronous pulley 18, fitting powdering roller motor synchronous pulley 19, powder-laying roller synchronous pulley 18 and powdering on powdering roller motor 3
It is connected between roller motor synchronous pulley 19 by toothed belt.
The powder cylinder 12 of the utility model can be independent powder supply cylinder 24 and moulding cylinder 23.In printing, powder supply cylinder 24 is by z
Axis elevating mechanism, which drives, rises one layer, and the decline of moulding cylinder 23 drives one layer of decline by z-axis elevating mechanism.
Preferably, for the ease of the taking-up of finished product after the completion of printing, powder cylinder 12 includes the coaming plate 27 of upper and lower opening, coaming plate 27
In be provided with partition 25, space in coaming plate 27 is divided into powder supply cylinder 24 and moulding cylinder 23 by partition 25.
Z-axis elevating mechanism includes two z-axis lifting units, and two z-axis lifting units respectively drive powder supply cylinder and moulding cylinder lifting,
Z-axis lifting unit includes that the upper end fixed plate 40 and lower end fixed plate 14 that polished rod 39 connects are oriented to by z-axis, and z-axis is oriented to polished rod 39
On be arranged with z-axis slide plate 35, between z-axis slide plate 35 and lower end fixed plate 14 by lead screw assembly be connected, lead screw assembly is fixed on
One end fixing sleeve of lower end fixed plate 14 is equipped with z-axis toothed belt, and z-axis lifting unit further includes z to feeding motor, and z is electric to feeding
Machine is also fixed with z-axis toothed belt, and two z-axis toothed belts are connected by z-axis toothed belt；The upper end of z-axis slide plate 35 is connected with
Support rod 28, support rod 28 pass through upper end fixed plate 40, and the upper end of support rod 28 is connected with powder supporting plate 30.If powder supply cylinder
24 and moulding cylinder 23 be independent cylinder body, then by powder supporting plate 30 be connected drive lifting.If it is preferred structure, powder
Supporting plate 30 passes through leveling component connection leveling powder bottom plate 29, foundation cream bottom plate 29 by the fixed powder bottom plate 29 of ball stud 41
Bottom plate i.e. as the powder supply cylinder 24 and moulding cylinder 23 that are divided by partition, 27 position of coaming plate are fixed, and two powder bottoms need to be only gone up and down
Plate 29.Specifically, leveling component is four-corner leveling nut 42.In the present embodiment, two z-axis lifting units pass through first respectively
Z to feeding motor 13 and the 2nd z to feeding motor 36 driving work independently, the first z to feeding motor 13 outside setting the first z to
It feeds motor cover 34 to protect, the 2nd z is protected by the 2nd z to feeding motor cover 37 to feeding motor 36.
Further, powder cylinder 12 further includes powder collection device 22, and powder collection device 22 is close to moulding cylinder 23 and is arranged.
In use, going out the three-dimensional model for the object to be printed using computer software design, host computer divides model slice
Every layer of image data is simultaneously processed into the identifiable print data of main control mechanism by layer, is successively sent to slave computer often after starting printing
Layer print data, main control mechanism control device reset, execute powdering work, the powder bottom plate 29 when powdering, where moulding cylinder 23
Decline the height of a powdering thickness, the powder bottom plate 29 of powder supply cylinder 24 rises the height of a powdering thickness, from y to feeding machine
If structure drives powder-laying roller 15 to release dry powder, and is shifted onto moulding cylinder 23 by powder-laying roller 15 and pave and be compacted；
After the completion of powdering, the print data that main control mechanism is transmitted according to host computer utilizes y-axis sliding block on y-axis guide rail polished rod 2
11 drive the movement of x-axis feed mechanism, and drive printing mechanism to move on x-axis guide rail polished rod 16 by x-axis sliding block, and printing is sprayed
First 20 are located in initial region to be printed；
Main control mechanism drives printing head 20 according to print data, even supplies bonding agent, driving for box device 4 by binder
20 jet binder of printing head, after the complete breadth of spray printing, the powder bottom plate 29 of moulding cylinder 23 declines a thickness, this is practical
Novel printer resets；
Powder supply cylinder 24 rises a thickness, executes powdering work again, is coated with the printing powder an of thickness, then complete to select
Area's spray printing work, and so on, until the 3D printing work for completing the model, printing equipment have all been made in all layerings of model
It is resetted with power spreading device.
Claims (9)
1. a kind of desktop grade 3D printer based on 3DP technique, which is characterized in that feed machine including main control mechanism, truss, y-axis
Structure, x-axis feed mechanism, printing mechanism, powder cylinder, bonding agent are even for box and z-axis elevating mechanism；
The main control mechanism respectively with y-axis feed mechanism, x-axis feed mechanism, printing mechanism and z-axis elevating mechanism signal phase
Even；
The y-axis feed mechanism is set to the truss top,
The x-axis feed mechanism is set to the y-axis feed mechanism and moves along the y-axis direction,
The printing mechanism is set to the x-axis feed mechanism and moves along the x-axis direction, and the x-axis direction is in y-axis direction
Same level, the printing mechanism are even connected for box by hose with the bonding agent,
The powder cylinder is located at below the printing mechanism, and the powder cylinder is used to supply printing powder to the printing mechanism and provide
Molding space,
The z-axis elevating mechanism is set to the truss lower part, and the powder cylinder is set to the z-axis elevating mechanism, the z-axis liter
Descending mechanism is for driving the powder cylinder to move along the z-axis direction, the z-axis direction and horizontal plane.
2. desktop grade 3D printer as described in claim 1, which is characterized in that the y-axis feed mechanism includes horizontal alignment
And it is rotatably dispose in the transmission feed rod of two y-axis on the truss, two y-axis transmission feed rods are close to the both ends of the truss
It is sheathed with y-axis toothed belt, passes through tooth form band connection, one of y-axis biography between the y-axis toothed belt of ipsilateral two
Dynamic feed rod also passes through toothed belt and is connected with y to feeding motor；
The y-axis feed mechanism further includes two y-axis guide rail polished rods that horizontal alignment is set on the truss, and the y-axis is led
Rail polished rod and y-axis transmission feed rod are orthogonal, are respectively sheathed with y-axis sliding block on two y-axis guide rail polished rods, the y to
Feeding motor is disposed therein on the y-axis sliding block, and two y-axis sliding blocks are individually fixed in ipsilateral y-axis toothed belt
On；
The x-axis feed mechanism is fixed on two y-axis sliding blocks.
3. desktop grade 3D printer as claimed in claim 2, which is characterized in that the x-axis feed mechanism includes rotating respectively
The x-axis toothed belt being set on two y-axis sliding blocks is connected between two x-axis toothed belts by x-axis toothed belt
It connects, one of them described x-axis toothed belt is fixed with x to feeding motor, and the x is set to the x-axis toothed belt to feeding motor
On y-axis sliding block where taking turns；
The x-axis feed mechanism further includes two x-axis guide rail polished rods being fixedly connected between y-axis sliding block, and two x-axis are led
It is sheathed with x-axis sliding block on rail polished rod, is individually fixed on ipsilateral x-axis rack gear on two x-axis sliding blocks, the printing mechanism
It is fixed on two x-axis sliding blocks.
4. desktop grade 3D printer as claimed in claim 3, which is characterized in that the printing mechanism include printing head frame with
And it is set to printing head and powder-laying roller on the printing head frame, it is sliding that the printing head frame is fixed on two x-axis
Block, the printing head are even connected for box by hose with the bonding agent, and the powder-laying roller both ends are rotationally connected with two institutes
It states on y-axis sliding block, the powder-laying roller drives rotation by powdering roller motor.
5. desktop grade 3D printer as claimed in claim 3, which is characterized in that the powder cylinder includes powder supply cylinder and moulding cylinder.
6. desktop grade 3D printer as claimed in claim 3, which is characterized in that the powder cylinder includes the coaming plate of upper and lower opening,
Partition is provided in the coaming plate, space in coaming plate is divided into powder supply cylinder and moulding cylinder by the partition.
7. desktop grade 3D printer as claimed in claim 6, which is characterized in that the z-axis elevating mechanism includes two z-axis liters
Drop portion, two z-axis lifting units respectively drive the powder supply cylinder and moulding cylinder lifting, and the z-axis lifting unit includes being oriented to by z-axis
The upper end fixed plate and lower end fixed plate of polished rod connection, are arranged with z-axis slide plate on z-axis guiding polished rod, the z-axis slide plate and
It is connected between the fixed plate of lower end by lead screw assembly, one end fixation that the lead screw assembly is fixed on the lower end fixed plate is arranged
There is z-axis toothed belt, the z-axis lifting unit further includes z to feeding motor, and the z is also fixed with z-axis toothed belt to feeding motor
Wheel, two z-axis toothed belts are connected by z-axis toothed belt；The upper end of the z-axis slide plate is connected with support rod, the branch
Strut passes through the upper end fixed plate, and the upper end of the support rod is connected with powder supporting plate, and the powder supporting plate passes through leveling
Component is connected with powder bottom plate.
8. desktop grade 3D printer as claimed in claim 7, which is characterized in that the leveling component is four-corner leveling nut.
9. such as desktop grade 3D printer described in claim 5 or 6, which is characterized in that the powder cylinder further includes that powder collects dress
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835210.2U CN209126175U (en) | 2018-11-08 | 2018-11-08 | A kind of desktop grade 3D printer based on 3DP technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835210.2U CN209126175U (en) | 2018-11-08 | 2018-11-08 | A kind of desktop grade 3D printer based on 3DP technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209126175U true CN209126175U (en) | 2019-07-19 |
Family
ID=67244321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821835210.2U Expired - Fee Related CN209126175U (en) | 2018-11-08 | 2018-11-08 | A kind of desktop grade 3D printer based on 3DP technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209126175U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406102A (en) * | 2019-08-27 | 2019-11-05 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | A kind of housing assembly of detachable 3D printer |
| CN110450415A (en) * | 2019-09-07 | 2019-11-15 | 苏州中瑞智创三维科技股份有限公司 | Z axis square box structure for 3D printer |
-
2018
- 2018-11-08 CN CN201821835210.2U patent/CN209126175U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406102A (en) * | 2019-08-27 | 2019-11-05 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | A kind of housing assembly of detachable 3D printer |
| CN110406102B (en) * | 2019-08-27 | 2023-09-12 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Can dismantle cylinder body subassembly of 3D printer |
| CN110450415A (en) * | 2019-09-07 | 2019-11-15 | 苏州中瑞智创三维科技股份有限公司 | Z axis square box structure for 3D printer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190719 Termination date: 20191108 |